Code 39 Barcode Reader

Fully functional barcode reader written for school project

This Matlab code acquires code 39 barcode image from user, reads the barcode and outputs the result. Every line is commented on the program so that it will be easy for others to understand how it works.
A cool feature about this program is it refines the barcode image in case the barcode doesn't look clear in the picture, then it reads the barcode. I have tested the code with different barcode pictures and it worked fine.

Let me know if you have any improvement suggestions.